Windows firewall is blocking QuickBooks Are you experiencing the Windows firewall is blocking QuickBooks error? Windows firewall is a crucial way to keep your system safe from virus or malware threats. But at the same time, the firewall can block unwanted programs if it sees them as a threat to your desktop. There could be several causes for this error to intrude on your system; read them below in this guide. Let us have a look at the solutions here and try to eliminate this